User manual BENDIX EC-16 ANTILOCK CONTROLLER

[. . . ] ® Bendix® EC-16TM AntiLock - Traction Controller MOUNTING HOLES (4) 18 PIN CONNECTOR 30 PIN CONNECTOR DIAGNOSTIC DISPLAY FIGURE 1 - EC-16TM CONTROLLER DESCRIPTION GENERAL The EC-16TM is an electronic antilock controller. It is the base component in a family of full vehicle wheel control antilock systems for buses, trucks and truck tractors. In addition to the antilock function, the EC-16 TM controller can be assembled and programmed to provide an optional traction control feature. Figure 1 shows the basic EC-16TM controller configuration. [. . . ] Separate the EC-16TM controller from the bracket. Perform the "Initial Start up Procedure" in the TROUBLESHOOTING section to assure proper system operation. INSTALLING THE EC-16TM CONTROLLER EC-16TM CONTROLLER MOUNTED ON ANTILOCK RELAY VALVE OR ANTILOCK TRACTION RELAY VALVE 1. After noting the relationship of the positioning marks made prior to disassembly, position and secure the EC-16TM controller to the valve using the four cap screws. Mount the assembled EC-16TM controller and antilock relay valve on the vehicle and orient it in the position marked before removal. Reconnect all air lines to the assembly. Reconnect the electrical connector(s) to the EC-16TM controller. Test the valve for operation and leakage prior to placing the vehicle in service. Perform the "Initial Start Up Procedure" in the TROUBLESHOOTING section to assure proper system operation. BRACKET MOUNTED EC-16TM CONTROLLER 1. Secure the EC-16TM controller to its bracket using the four cap screws. After noting the positioning marks, mount the EC-16TM controller on the vehicle using the mounting hardware retained during removal. Connect the electrical connector(s) to the EC-16TM controller. DIAGNOSTIC LEDS There are ten LEDs plus a magnetically actuated reset switch in the EC-16TM controller diagnostic display. The first six LEDs locate a problem to a specific area of the vehicle, and the next three indicate the problem component or its wiring. The LEDs are software driven and are either ON or OFF depending upon their monitor function. (Note: right and left, front and rear are determined from the driver's seat. ) 10 Note: FRT Red LED MID Red LED (See Note) RER Red LED RHT Red LED LFT Red LED TRC Red LED MOD Red LED SEN Red LED ECU Red LED VLT Green LED RESET + No LED The MID LED is used with some but not all vehicles. When six speed sensors are not installed this LED is not used in the diagnostic process. However, it will light when a magnet is placed on the RESET switch in the diagnostic display. "MOD" (Modulator) LED This Red LED illuminates and latches ON to indicate a permanent or intermittent open or short circuit in the solenoids of one of the four M-21TM modulators or the wiring connecting them to the system. When indicating a problem with an M-21TM modulator this LED will be illuminated with two positioning LEDs (RHT/LFT + FRT/RER). NOTE: The MID positioning LED should not be illuminated with this LED. This LED is also used to indicate a problem with an ATR-1TM or ATR-2TM, antilock traction relay, solenoid. When illuminated for a traction system problem the TRC LED will also be on. "SEN" (Speed Sensor) LED This Red LED illuminates and latches ON to indicate permanent or intermittent failure. The failures indicated are; open or shorted wheel does not conform to design criteria. [. . . ] YES NO REPEAT "INITIAL START-UP PROCEDURE" YES REPLACE THE RELAY AND REPEAT "INITIAL START-UP PROCEDURE" REPLACE THE EC-16TM CONTROLLER AND RETEST. 26 SECTION IX - TESTING FOR FALSE INDICATION CAUSED BY WHEEL SPEED COMPONENTS WITH IGNITION ON, HOLD A MAGNET ON RESET OF EC-16TM CONTROLLER AND NOTE LEDs START HERE NO ARE ALL LEDs ILLUMINATED? REPLACE EC-16TM CONTROLLER YES All LEDs Illuminated?REMOVE MAGNET Magnet here EC-16TM CONTROLLER DIAGNOSTIC DISPLAY TURN THE IGNITION OFF AND INSPECT APPROPRIATE AXLE AND WHEEL FOR PRESENCE OF AN EXCITER OR TONE RING AND SPEED SENSOR. CHECK SENSOR "GAP" (DISTANCE BETWEEN SPEED SENSOR AND EXCITER RING) AND BEARING END PLAY. RE-ADJUST AS NECESSARY. RUN VEHICLE AT 7 MPH OR MORE FOR 5 SECONDS OR MORE. [. . . ]